Hi everyone,
This is my first thread at droidrzr.com here and it is about a simple fix for
invalid cd otv (cg system) invalid sp data error. I got this bricked xt912 today for repairs at the shop that i work professioanly. I spend my whole sunday by searching and trying a lot of suggestions,scripts and methods.I read similar threads for droid 3, bionic,xt912 on here and otther forums. Information gathered,tried but unfortunately none couldn't help to unbrick the device. The device and software information when i got it.
Device : XT912 Droid Razr Maxx
Bootloader 0A.77
Error : invalid cd otv (cg system) invalid sp data , Can't pass Flash boot failure screen, won't load os, recovery
CID : Intact
Battery: Empty (lucky me, rocking the wonderful TBH Factory cable )
Failure reason as told by customer
Device had the jellybean ota leak running. he tried to downgrade to ics and his brother interrupted the flashing process in the middle.
How i fixed it ?
The preinstalled partition was damaged and couldn't be correctly flashed with moto-fastboot in my case. This mismatch also disabled the access to recovery and phone kept stuck at
invalid cd otv (cg system) invalid sp data error. Every partition of the device was flashable though. After many failed flashing,unbricking squence attempts with rsd, moto-fastboot commands, Matt's wonderful 1.8.2 unbricking utility. i thought of comparing flash files and looking for missing lines in scripts. Obviously, i didn't try to flash cdt.bin partition before, and i said why not, do it ! i started to look for cdt.bin file of xt912 jelly bean. Luckily it was avaiable in Blur_Version.6.16.211.XT912.Verizon.en.US.zip ota leak file. I did as it follows and it is successfully unbricked now. Special thanks to mattgrofl for his utility.
moto-fastboot flash cdt.bin cdt.bin_16G ( repartitions the emmc )
moto-fastboot reboot bootloader
Run matt's 1.8.2 utility ( will flash preinstalled now )
Once it finishes, reboot to recovery. i know you'll be happy to see adroid with exclamation mark again.
Wipe data / factory reset ( will correctly format the partition table according to newly flashed cdt.bin_16G )
Wipe cache
Install zip from sdcard > Flash Blur_Version.6.16.211.XT912.Verizon.en.US.zip ! ( Final step ! Congratz. )
Regards, Semseddin of
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